The man is _____ worker. He works in _____ office. A. a, a B. a, an C. an, an
We must save the elephants because they are ________.
—How many pandas are there in the zoo? —There aren’t ________.
It’s ________ to listen to light music when you feel tired(疲劳的).
I can’t see any ________ animals in the small zoo.There are only some monkeys and birds.
She is a doctor.Her mother is a doctor,________.